{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["concept or principle", "machanical property", "material", "enabling technology", "engineering feature", "process parameter"], "input": "In the recent time friction stir welding ( FSW ) , a solid state welding process has rapidly gained attention for joining high melting point materials like Cu , Fe , Ti and their alloys apart from Al alloys due to its several advantages over fusion welding techniques ."}
{"concept or principle": ["process", "materials"], "machanical property": ["melting point"], "material": ["Cu", "Fe", "Ti", "alloys", "Al alloys"], "enabling technology": [], "engineering feature": [], "process parameter": []}